我不是没素材了，我只是没时间了。

Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.

创新不仅仅是技术的问题，而是改变人们思考和行动的方式。

负责任的林业不是限制进步，而是重新定义进步的含义。